Fluid fuel burner



Sept. 19, 1944. E, J DOLL 1 2 ,358,386

FLUID FUEL BURNER Filed Jan. 10, 1944 lowing described parts.

Patented Sept. 19, 1944 UNITED STATES PATENT OFFICE FLUID FUEL BURNER.Elmer J. mu, Kansas City, Mo. Application January 10, 1944, Serial No.517,666

1 Claim.

My invention relates to improvements in fluid fuel burners. It isparticularly well adapted for burning liquid fuel, such as heavyhydrocarbon oils, petroleum, or refuse oils.

One object of my invention is the provision of a novel burner oi thekind described, which will completely atomize and oxydize the fuel, andwhich will eliminate the deposit carbon, soot or oil drippings.

A further object of my invention is the provision of novel means bywhich the oxydizing agent or agents used are intermingled with the fuel.

Another object of my invention is the provision of a burner oi the kinddescribed, which is simple, cheap to construct, durable, not likely toget out of order, which can be easily made and operated by a person whois not a skilled mechanic, and which is efllcient in its operation.

the center of the disk ll.

12 are clrcumferentially angled in a like direc- The novel features ofmy invention are hereinafter fully described and claimed.

In the accompanying drawing, which is illustrative of a preferred formof my invention,

Fig. l is a longitudinal side view, shown partly in vertical sectionandpartly in elevation, of my improved burner. Y

Fig. 2 is a side elevation, partly broken away of the burner shown inFig. 1.

Fig. 3 is a reduced side elevation of the burner, shown in Figs. 1 and2, operatively mounted in an air conducting casing, shown in verticalsection and operatively supported in the wall of a structure with whichthe burner is to be used, a portion of said structure being shown invertical section.

Fig. 4 is an enlarged end view of one of the radially slotted partitionsof the burner.

Fig. 5 is an edge view of what is shown in Fig. 4. I

Fig. 6 is an end view, enlarged, or the partition which is intermediateof the two slotted partitions.

Similar characters of reference designate similar parts in the difierentviews.

The burner shown illustrated in the drawing as one form of my invention,comprises the foldesignates a steam chamber consisting of a horizontaltube 2, to the ends of which are secured respectively end members 3 and4.

Centrally secured in the end member 3 is a tube 5, .which is connectedwith a fuel fluid supply source, not shown, as an oil tank. A fluid.discharge tube 8, having its intake end. threaded,

is fixed in the inner end of the tube 5, to which it is held by a nut 1.The other end of the tube with a source of steam supply under pressure,as

a steam boiler, not shown.

Attached at one end to the outer side of the end disk or member 4 is ahorizontal tube l0 havin secured to its other end a disk ll, shownenlarged in Fig. 4, and which is provided therethrough with a series ofradial slots l2, evenly spaced, and which extend inwardly from theperiphery of the disk to points equally spaced from The sides of theslots tion from a right angle. The chamber between the end member 4 andthe slotted disk ll comprises a mixing chamber, designated by I3, inwhich oil discharged from the tube 6 mixes with the steam entering thechamber l3 from'the hole 8.

Attached to the side of the disk ll opposite to the side next thechamber l3 is one end of a longitudinal horizontal tube M, the other endof which is attached to one side of a partition disk 15 having throughit a central hole Hi. The

space between the disks II and I5 is designated chamber ll.

Attached to the other side of the disk i5 is one end of a longitudinalhorizontal tube l8 the other end of which is attached to one side of atransverse slotted disk l9, which corresponds in structure and functionto the disk H. The space between the disk l5 and disk i9 is designatedchamber 20.

Attached to the other side of the slotted disk I9 is one end of alongitudinal tube 2i, having its other end of less diameter, and inwhich is fitted one end of a discharge tube 22. Th space in the tube 2|between the disk l9 and the discharge tube 22 is designated chamber 23.

Referring to Fig. 3, 24 designates ahorizontal tube having at one end ahead 25 and at its other end a head 26. Fastened toone side of the tube24 is an air supply tube 21 interiorly communicating with the-tube 24and connected to a source of air supply, preferably under pressure, asan air pump, not shown. The head 26 has a central hole 28 in' which issecured one end of a horizontal tube 29, which, as shotn, is secured ina hole in one side of a wall 30, which may be a part of a fire box of asteam boiler, not shown. The head 25 has a central hole therethrough inwhich is secured to the right of the steam inlet 9, the periphery of thetube 2. The space in the tubes 24 and 29 is designated chamber 2. The

portion of the burner. at the right of the tube 2, extends centrallyinto the chamber ii, the discharge tip of the discharge tube 22terminating adjacent to the discharge end of the air tube 29.

In operation, steam under high pressure is ad-' mitted into the steamchamber I through the inlet tube 9, and fluid fuel, as oil, is suppliedto the tubes and 8, and the oil discharged from the tube 6 mixes withthe steam and is discharged therewith through the hole ,8 into themixing chamber l3.

From the mixing chamber 13, the mixed oil and steam passes through thebevelled slots l2 of the disk ll into the chamber H, in separate streamswhich due to the pressure of the steam whirl to the right, lookingforwardly, the oil being sprayed, so that a fine .mist passes throughthe hole IS, in the partition disk |5,into the chamber 20, from whichthe mist passes through the slots I2 of the disk l9, where the streamsof mist are further whirled in the chamber 23 with a force that atomizesthe oil, and the mixture enters the discharge tube in the form of highlyheated vapor, which, when lighted, is oxidized by the air under.pressure passing out of the chamber 3|, and burns fiercely in the firebox, or other place into which the burning mixture is discharged.

When the mixture is burned, there is no deposit of carbon soot or dropsof oil, as the latter is completely burned.

When the burner is made, if desired, the outer ends of the slots l2 ofthe disks H and is may be closed. as by spot welding, but in the set upshown, this need not be done, due to the fact that air in the chamber 3|will be mixed with the steam and oil mixture passing into the chamber.3|from the slots I 2, and will assist in the oxidation of the oil.

In order that the steam and oil mixture shall be driven with strongforce through the slots l2 of the disks II and is, so as to be givenviolent whirls, the cross sectional area of the passage through thedischarge tube 221, and that of the hole H5 in the disk l5, should be atleast as great as the combined cross sectional area of the slots l2 ineither one of the slotted disks II and Hi, to prevent back pressure. Dueto this construction, the oily vapor issuing from the discharge tube 22will have a maximum of atomization, and will be r quickly oxidized bythe air with which it mixes, with the use of a minimum amount of steam,and with the elimination of carbon, soot or oil deposits.

' As shown, the main body or casing of the burner comprising the tubes2, I0, I 4, l8, 2'! and 22 are separate pieces, as are the end members 3and-4 and the disks ll, I5 and I9, these parts being fastened together.as by spot welding. By means of this construction, the burner can beeasily made by an unskilled person.

The tubes 2, IO, M, I8 and 22 may be pipe sdctions cut from lengths ofpiping of proper diameters and in desired lengths, and the tube N may bea pipe section comprising a usual reduc ing connector. The end members 3and 4 and i the disks ll, l5 and I9 may be easily cut from fiat metal ofdesired thickness'into' the desired form. The beveled slots l2 in thedisks II and It! may be easily cut with a hack saw from theirperipheries inwardly into the beveled form, and the central holes in theend members 3 and l and the hole l6 in the disk l5 made with a handdrill.

If desired, however, the six pipe sections 2, I0, I 4, l8 and 22, andthe end members 3 and 4 and disks ll, l5 and I9, may be made originallyin any well known manner, as by molding or die casting to form anintegral body.

Many modifications of my invention, within the scope of the appendedclaim, may be made without departing from the spirit of my invention.

What I claim is:

Aiiuid fuel burner of the kind described comprising a longitudinaltubular casing having a closed rear end and at its front end a dischargenozzle, two transverse partitions in and across said casing at the rearof said nozzle, one forward of the other, and each having therethroughradial slots arranged in a circle and extending forwardly and laterallywith their sides angled in a like direction relative to thecircumference of the circle, a partition across said casing intermediateof said slotted partitions and. having a central hole therethrough, thecross sectional area of the inside of said nozzle and that of said holeeach being at least approximately as great as the sum of the crosssectional areas of the slots of either of said slotted partitions, apartition across said casing at the rear of said rear slotted partitionand having a central opening, said casing having at the rear of the lastnamed partition an inlet for fluid under pressure,

and piping for conveying fluid fuel having its front end axially alinedwith and discharging through said central opening and spaced from theperimeter thereof.

' ELMER J. DOLL.

